# coding=utf-8

import os

def main():
    process = os.popen("df | sed -n '5, 0p' | awk '{print $2, $3}'")
    res = process.read()
    process.close()
    (total, used) = res.split(' ')
    total = int(total)
    used = int(used)
    percent = used * 100 / total
    if percent < 85:
        return

    print("Warning: disk usage is {:.2f}".foramt(percent))
